/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonButtonBase.h
Disables this button with a reason (use instead of SetIsEnabled)
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Common Button|Setters") void DisableButtonWithReason ( const [FText](API\Runtime\Core\Internationalization\FText) & DisabledReason )